g. The system will adapt to changes in the jamming environment and changes in traffic demands regardless
of environment. The terminal will use spread spectrum, burst, FH, and other techniques to reduce the
vulnerability to RDF, interception, exploitation, and jamming. The AN/TSC-124 will be interoperable with all
other MILSTAR terminals.
3. User-controlled interface device.
a. UCIDs interface between the user of the I/O device and the terminal. It can accept inputs between 75
bp/s and 2.4 kbp/s and support full-duplex communications. The user requests service through the UCID. The
UCID lets a user tell the terminal which specific I/O and COMSEC devices are attached to the two ports of the
UCID. Information relating to the service requested, discrete addresses of sender and receiver(s), and I/O
device and COMSEC compatibility can be entered by the user. This alerts the terminal and the servicing
satellite to establish the requested type of link between the sender and receiver(s). Once the link is established,
the UCID must alert the sender that he may pass his traffic.
b. Four UCIDs will be provided with each AN/TSC-124. Each can accept two inputs, though not at the
same time. Three UCIDs will normally be provided to the remote users. The fourth UCID will be reserved
within the shelter to allow the AN/TSC-124 operator access to the system for the operator I/O devices provided
with the terminal (AN/UCG-74 and ANDVT).
c. The UCID can be used by a general purpose user (GPU) of any grade or MOS. The UCID, although a
component of the AN/TSC-124 terminal, will be provided to the user at the user's remote location. The UCID,
associated COMSEC (that is, KG-84), and user-owned and provided I/O device will be operated by the user of
LEARNING EVENT 9: CONTROL AND MANAGEMENT
a. The US Air Force MILSTAR ground command post terminal (GCPT), the Navy (EHF) Satellite
Program (NESP), and the Army SCOTT (AN/TSC-124) provide the services with control and access to the
MILSTAR satellite constellation to support the national command authority (NCA)..
b. The MILSTAR mission control element, called the Theater MILSTAR Control Center (TMCC), will
exercise overall control within a theater of operations along with a number of constellation-control stations.
The specific roles for each and the requirements for interface are being developed by the US Air Force Space
Command. The Army Space Command is refining the specific responsibilities and procedures for Army-
specific MILSTAR control.